Optio E10: memory card error

if the cards work ok on something else then there's a issue within camera it could be the actual sd connector within the camera ? doess the camera support that size ? Optio E10 supports upto 1GB SD Card http://www.pentaxcanada.ca/pdf/o_manuals/om_OPTIOE10_e.pdf it might not work with the high speed sd cards ? Regards

exist in the market of sd up to 4 giga format not SDHC but simply signed sd.
With that kind certainly does

Most devices on the market today do not support SDHC yet, including those nifty 10-1 or 8-1 or a kajillion-1 PC docks that come preloaded in almost all desktop computers today. Always refer to your manual or manufacturer's website when installing new hardware in a device to make sure it is compatible.